260309 has 8 divisors (see below), whose sum is σ = 305088. Its totient is φ = 217440.

The previous prime is 260269. The next prime is 260317. The reversal of 260309 is 903062.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (38136).

2²⁶⁰³⁰⁹ is an apocalyptic number.

It is an amenable number.

260309 is a deficient number, since it is larger than the sum of its proper divisors (44779).

260309 is an equidigital number, since it uses as much as digits as its factorization.

260309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 260309 is about 510.2048608157. The cubic root of 260309 is about 63.8503175149.

It can be divided in two parts, 26030 and 9, that multiplied together give a triangular number (234270 = T₆₈₄).

The spelling of 260309 in words is "two hundred sixty thousand, three hundred nine".